CVE-2026-116478 Details
Description
A vulnerability was detected in a2aproject a2a-go up to 2.4.0. This affects the function CreateExecutor of the file a2asrv/agentexec.go of the component Push Notification Handler. The manipulation results in information exposure through error message. It is possible to launch the attack remotely. Upgrading to version 2.5.0 mitigates this issue. The patch is identified as f4d588216b0c9520e94d571bab725c38ce23064c. It is recommended to upgrade the affected component.
A vulnerability allowing information exposure through error messages has been identified in the a2aproject a2a-go library, specifically in versions prior to 2.5.0. The issue arises in the Push Notification Handler component, within the CreateExecutor function of the a2asrv/agentexec.go file. This vulnerability can be exploited remotely by manipulating the error handling of push configuration, which inadvertently reveals sensitive information.
Users are advised to upgrade to a2aproject a2a-go version 2.5.0 or later, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 26, 2026CISA-ADP
Assessed Nov 2, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/a2aproject/a2a-go/ | [email protected] | Vendor |
| https://github.com/a2aproject/a2a-go/commit/f4d588216b0c9520e94d571bab725c38ce23064c | [email protected] | Source CodeVendor |
| https://github.com/a2aproject/a2a-go/pull/393 | [email protected] | Issue TrackingVendor |
| https://github.com/a2aproject/a2a-go/releases/tag/v2.5.0 | [email protected] | Release NotesVendor |
| https://vuldb.com/cve/CVE-2026-116478 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/1014887 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/426391 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/426391/cti | [email protected] | Content Wall |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-200 | Exposure of Sensitive Information to an Unauthorized Actor | [email protected] |
| CWE-209 | Generation of Error Message Containing Sensitive Information | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| a2aproject a2a-go | <= 2.4.0 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 2, 2026 | CVE Modified | CISA-ADP |
| Oct 26, 2026 | New CVE Received | [email protected] |